Au(100) - \(0.1 \; \mathrm{M}\) \(\ce{ HClO4 }\)

echemdb identifier: blizanac_2004_anion_625_f3a_black
tags: BCV

A cyclic voltammogramm for Au(100) recorded in \(0.1 \; \mathrm{M}\) \(\ce{ HClO4 }\) at a scan rate of \(50 \; \mathrm{mV\,s^{-1}}\) from Figure 3a in B. B. Blizanac et al. Anion Adsorption, CO Oxidation, and Oxygen Reduction Reaction on a Au\(100\) Surface:\, The pH Effect. The Journal of Physical Chemistry B, 108\(2\):625–634, 2004. URL: https://doi.org/10.1021/jp036483l \(visited on 2019\-03\-10\), doi:10.1021/jp036483l.

Further information

The figure shows digitized data.

The Au(100) electrode was prepared by:

flame annealed in a propane flame
cooled in an Ar atmosphere
mounted in the RRDE setup
contact electrolyte under potentiostatic control at ≈0.1 V vs. SCE
electrode was not rotated (0 rpm) during measurement

Metadata

Details on the electrochemical system (yaml)

electrodes:
- function: reference electrode
  name: REF
  type: Hg/Hg2Cl2-sat
- crystallographicOrientation: '100'
  function: working electrode
  geometricElectrolyteContactArea:
    unit: "cm\xB2"
    value: 0.283
  material: Au
  name: WE
  preparationProcedure:
    description:
    - flame annealed in a propane flame
    - cooled in an Ar atmosphere
    - mounted in the RRDE setup
    - "contact electrolyte under potentiostatic control at \u22480.1 V vs. SCE"
    - electrode was not rotated (0 rpm) during measurement
  shape:
    diameter:
      unit: cm
      value: 0.6
    length:
      unit: cm
      value: 0.4
    type: cylinder
  source:
    manufacturer: homemade
electrolyte:
  comment: The electrolyte was at room temperature.
  components:
  - name: H2O
    proportion:
      unit: volume percent
      value: 100
    source:
      purity:
        grade: ultrapure water
      refinement: triply pyrodistilled
    type: solvent
  - concentration:
      unit: "mol L\u207B\xB9"
      value: 0.1
    name: HClO4
    source:
      purity:
        grade: Semiconductor Grade
      supplier: Aldrich
    type: acid
  - name: Ar
    source:
      purity:
        grade: Research Purity
      supplier: Bay Gas
    type: gas
  ph:
    comment: "Estimated with CurTiPot on extraction from publication using a temperature\
      \ of 25\xB0C."
    value: 1.041
  temperature:
    unit: deg_C
    value: 25
  type: aqueous
type: electrochemical

Citation key (bibtex)

@article{blizanac_2004_anion_625,
    author = "Blizanac, B. B. and Lucas, C. A and Gallagher, M. E. and Arenz, M. and Ross, P. N. and Markovi\'c, N. M.",
    title = "Anion Adsorption, CO Oxidation, and Oxygen Reduction Reaction on a Au(100) Surface:\, The pH Effect",
    shorttitle = "Anion Adsorption, CO Oxidation, and Oxygen Reduction Reaction on a Au(100) Surface",
    date = "2004-01-01",
    year = "2004",
    journal = "The Journal of Physical Chemistry B",
    volume = "108",
    number = "2",
    pages = "625--634",
    issn = "1520-6106",
    doi = "10.1021/jp036483l",
    url = "https://doi.org/10.1021/jp036483l",
    urldate = "2019-03-10",
    abstract = "The effects of pH on the surface reconstruction of Au(100), on CO oxidation, and on the oxygen reduction reaction (ORR) have been studied by a combination of surface X-ray scattering (SXS), Fourier transform infrared (FTIR) spectroscopy, and rotating ring-disk electrode (RRDE) measurements. In harmony with previous SXS and scanning tunneling microscopy (STM) results, the potential-induced hexagonal (``hex'') to (1 \texttimes{} 1) transition occurs faster in an alkaline electrolyte than in acidic media. In alkaline solution, CO adsorption facilitates the formation of a ``hex'' phase; in acid solution, however, CO has negligible effect on the potential range of thermodynamic stability of the ``hex'' {$\leftrightarrow$} (1 \texttimes{} 1) transition. We propose that in KOH the continuous removal of OHad in the Langmuir-Hinshelwood reaction (CO + OH = CO2 + H+ + e-) may stabilize the ``hex'' phase over a much wider potential range than in CO-free solution. In acid solution, where specifically adsorbing anions cannot be displaced by CO from the Au(100) surface, CO has negligible effect on the equilibrium potential for the ``hex'' {$\leftrightarrow$} (1 \texttimes{} 1) transition. Such a mechanism is in agreement with the pH-dependent oxidation of CO. The ORR is also affected by the pH of solution. It is proposed that the pH-dependent kinetics of the ORR on Au(100) can be unraveled by finding the relationship between kinetic rates and two terms:\, (i) the energetic term of the Au(100)-O2- interaction determines the potential regions where the rate-determining step O2 + e = O2- occurs, and (ii) the preexponential term determines the availability of active sites for the adsorption of O2-."
}

Details about the original figure in the publicaton (yaml).

comment: ''
fields:
- name: E
  orientation: horizontal
  reference: RHE
  type: number
  unit: V
- name: j
  orientation: vertical
  type: number
  unit: "\xB5A cm\u207B\xB2"
measurementType: CV
scanRate:
  unit: mV / s
  value: 50.0
simultaneousMeasurements: []
type: digitized

Details about the curation process of this entry (yaml).

process:
- date: '2026-02-04'
  name: Johannes M. Hermann
  orcid: https://orcid.org/0000-0001-7119-1295
  role: curator